The key to understanding logical structure of system of socialism with Chinese characteristics in a scientific way lies in defining the tension relation pattern of the three elements. These elements reflect the relation pattern of main body and part, main body and supplementary generality-section instead of indicating orderly arrangement of time order, juxtaposition at logical level or the differences of practical themes. Deng Xiaoping's theory focuses on the overall plan of practical themes and guidance of theoretical basis and lays foundation for the logical structure of system of socialism with Chinese characteristics. Therefore, its holistic theoretical system bears preexistent logical priority and dominant function. At present, it is necessary for China to deepen and develop the key points of the system of socialism with Chinese characteristics within the logical structure provides by Deng Xiaoping's theory.